Here is a picture of the west bound mixed train led by an EMD SD70ace-t4 on the Huey P Long Bridge. Both (East and West Bound) Amtrak's Sunset limited use this bridge to cross the Mississippi river towards New Orleans and LA respectively.
The Railroad tracks on the bridge are owned by New Orleans Public Belt Railroad, a class 3 railroad which interchanges with six Class I railroads (BNSF, CSX, Canadian National (CN), Norfolk Southern (NS), Kansas City Southern (KCS) and Union Pacific (UP)) serving the city.
